Waving to supporters

Tribune photo by Kuni Takahashi

Illinois State Treasurer Alexi Giannoulias acknowledges supporters Sunday, after announcing that he would run for the U.S. Senate seat once held by President Barack Obama and currently held by Roland Burris.

Illinois State Treasurer Alexi Giannoulias acknowledges supporters Sunday, after announcing that he would run for the U.S. Senate seat once held by President Barack Obama and currently held by Roland Burris. (Tribune photo by Kuni Takahashi)

Illinois State Treasurer Alexi Giannoulias acknowledges supporters Sunday, after announcing that he would run for the U.S. Senate seat once held by President Barack Obama and currently held by Roland Burris.